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22 October, 11:14

High-speed train pulls out of the Lyons station and is accelerating uniformly to its cruising speed. Inside one of the cars, a 3 N digital camera is hanging from the luggage compartment by a light, flexible str that makes a 12 angle with the vertical. What is the acceleration of the train?

3.06m/s

2.08m/s

5.00m/s

4.09m/s

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  1. 22 October, 13:11
    0
    b

    Fnet = T

    Fx = m*ax

    Fy = m*ay

    Fy = T * cos12º = m * g

    T * 0.97 = 3 * 9.8

    T = 3*9.8/0.97

    = 30.057 N

    Fx = m*a = T * sin12º

    Fx = 3 * a = 30.057 * 0.24

    a = (30.057*0.208) / 3

    ≈ 2.083 m/s²
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